These authors contributed equally to this work.
Softening and Hardening of Macro- and Nano-Sized Organic Cocrystals in a Single-Crystal Transformation†
Article first published online: 20 JUL 2011
Copyright © 2011 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
Angewandte Chemie International Edition
Volume 50, Issue 37, pages 8642–8646, September 5, 2011
How to Cite
Karunatilaka, C., Bučar, D.-K., Ditzler, L. R., Friščić, T., Swenson, D. C., MacGillivray, L. R. and Tivanski, A. V. (2011), Softening and Hardening of Macro- and Nano-Sized Organic Cocrystals in a Single-Crystal Transformation. Angew. Chem. Int. Ed., 50: 8642–8646. doi: 10.1002/anie.201102370
C.K., L.R.D., and A.V.T. gratefully acknowledge financial support from the University of Iowa. D.K.B, T.F., and L.R.M acknowledge the National Science Foundation (DMR-0133138) for partial support.
- Issue published online: 1 SEP 2011
- Article first published online: 20 JUL 2011
- Manuscript Received: 6 APR 2011
- University of Iowa
- National Science Foundation. Grant Number: DMR-0133138
- atomic force microscopy;
- single-crystal transformations;
- supramolecular chemistry
AFM nanoindentation was used to demonstrate that millimeter- and nanometer-sized organic cocrystals exhibit changes in the mechanical properties before, during, and after a single-crystal-to-single-crystal [2+2] photodimerization of olefins. Millimeter-sized crystals become 40 % softer, whereas nanocrystals of the same material become 40 % harder following the photoreaction.